1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Shkiper50 [21]
4 years ago
14

Question 1

Mathematics
1 answer:
Arada [10]4 years ago
7 0
We have that

<span>question 1
Add or subtract. 
4m2 − 10m3 − 3m2 + 20m3
=(4m2-3m2)+(20m3-10m3)
=m2+10m3

the answer is the option
</span><span>B: m2 + 10m3

</span><span>Question 2: 
Subtract. (9a3 + 6a2 − a) − (a3 + 6a − 3)
=(9a3-a3)+(6a2)+(-a-6a)+(-3)
=8a3+6a2-7a-3

the answer is the option
</span><span>B: 8a3 + 6a2 − 7a + 3 

</span><span>Question 3: 
A company distributes its product by train and by truck. The cost of distributing by train can be modeled as −0.06x2 + 35x − 135, and the cost of distributing by truck can be modeled as −0.03x2 + 29x − 165, where x is the number of tons of product distributed. Write a polynomial that represents the difference between the cost of distributing by train and the cost of distributing by truck. 


we have that
[</span>the cost of distributing by train]-[the cost of distributing by truck]
=[−0.06x2 + 35x − 135]-[−0.03x2 + 29x − 165]
<span>=(-0.06x2+0.03x2)+(35x-29x)+(-135+165)
=-0.03x2+6x+30

the answer is the option
</span><span>C: −0.03x2 + 6x + 30
</span><span>

</span>
You might be interested in
Write 0.15 as a fraction in simplest form. 0.15 =​
MatroZZZ [7]

Step-by-step explanation:

0.15 as a Fraction in simplest form to convert 0.15 to a fraction and simplify to the lowest form.

Working:

0.15 = 15/100

So the simplest form is :

0.15 = 3/20

5 0
3 years ago
Mrs. Kermit has 29 markers. She gives 12 markers to Mr. Cooke and divides the rest among 5 other teachers. If each of the teache
romanna [79]

Answer: 2 markers.

Step-by-step explanation:

1. You know that she gives 12 markers to Mr. Cooke, then the rest among is:

29 markers-12 markers=17 markers

2. She divides the rest among 5 other teachers and each one of them get the same number of markers. So, you need to divide 17 markers by 5 teachers as following:

17 markers/5=3.4 markers

3. But the number of marker each one teacher has can't be a decimal number, so this number must be: 3 markers for each teacher.

3. The number of markers that will be left over is:

17 markers-(5*3 markers)=2 markers

8 0
4 years ago
Roy and Sam start solving the equation as follows.
denpristay [2]

Answer:

The correct option is D.

Step-by-step explanation:

The given equation is

-3x+4=5x-6

According to the addition property of equality a=b and a+c=b+c are equivalent equations.

Use addition property of equality, add 3x on both the sides.

-3x+4+3x=5x-6+3x

4=8x-6

Therefore Sam's work is incorrect because he make calculation mistake.

According to the subtraction property of equality a=b and a-c=b-c are equivalent equations.

Use subtraction property of equality, subtract 5x from both the sides.

-3x+4-5x=5x-6-5x

-8x+4=-6

Therefore Roy's work is correct because he used subtraction property.

Option D is correct.

7 0
3 years ago
Harvey conducted a probability experiment using a cube numbered 1-6 and a spinner with three equal spaces, as shown.
svet-max [94.6K]

Answer:

We have two independent events.

A number cube, with 6 possible outcomes.

A spinner, with 3 possible outcomes.

Each element in the combined sample space will be something like:

(outcome of the number cube, outcome of the spinner).

Then the number of possible outcomes in the sample size is equal to the product between the number of outcomes in each event.

Sample space size = 6*3 = 18.

3 0
3 years ago
You and a friend want to know how much rope you need to climb a large rock. Your friend is 5.5 feet tall and casts a shadow that
diamong [38]
The concept that is useful in order to answer this item is the concept of ratio and proportion. Let x be the height of the rock from the ground. We use the equation below to answer.
                                    5.5 ft / 18 ft = x ft / 209.5 ft
The value of x from the equation is 64 ft. Thus, they will be needing approximately 64 ft of rope.
4 0
3 years ago
Other questions:
  • Lines AB and CD are parallel. If 7 measures (2x + 4)°, and 6 measures 50°, what is the value of x?
    6·1 answer
  • Luxury items such as watches and jewelry can be up to 30 percent cheaper in Europe than in China. Suppose a watch costs $347.89
    12·1 answer
  • 9. A grocery store used to sell buik chocolate chip cookies for $0.65 for
    15·1 answer
  • A car travels 200 miles in 2 hours and 30 minutes. What is it's average speed?
    5·2 answers
  • The diagonals of a trapezoid are perpendicular <br> Always <br> Sometimes <br> Never
    11·1 answer
  • Which of the following shows a number in fraction form? A. 3 B. 3.7 C. 3 ∕7 D. √2
    5·2 answers
  • First derivative of b/x ​
    14·1 answer
  • The first three terms of a sequence are given. Round to the nearest thousandth (if
    7·1 answer
  • Solve the following systems mathematically using substitution <br><br>-4x-3y=12<br><br>y=2x-14
    8·1 answer
  • Which is the midpoint with line segment with endpoints (1, 2) and (7, 8)?
    5·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!